CN101866126A - Recording sheet surface detection apparatus and image forming apparatus - Google Patents

Recording sheet surface detection apparatus and image forming apparatus Download PDF

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Publication number
CN101866126A
CN101866126A CN201010164243A CN201010164243A CN101866126A CN 101866126 A CN101866126 A CN 101866126A CN 201010164243 A CN201010164243 A CN 201010164243A CN 201010164243 A CN201010164243 A CN 201010164243A CN 101866126 A CN101866126 A CN 101866126A
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China
Prior art keywords
image
recording sheet
light beam
light
rayed
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Granted
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CN201010164243A
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Chinese (zh)
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CN101866126B (en
Inventor
海老原俊一
石田功
小山正一
松井伯夫
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Canon Inc
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Canon Inc
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Priority to CN201210455685.XA priority Critical patent/CN102937782B/en
Publication of CN101866126A publication Critical patent/CN101866126A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/60—Apparatus which relate to the handling of originals
    • G03G15/607—Apparatus which relate to the handling of originals for detecting size, presence or position of original
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/009—Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5029—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the copy material characteristics, e.g. weight, thickness
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00611—Detector details, e.g. optical detector
    • G03G2215/00616—Optical detector
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00751—Detection of physical properties of sheet type, e.g. OHP

Abstract

The patent provides a recording sheet surface detection apparatus and an image forming apparatus. An image forming apparatus for detecting surface conditions of a recording sheet on which an image is formed, includes a light source configured to emit a first light beam and a second light beam, an image capture device configured to capture a first image of a surface of the recording sheet illuminated with the first light beam and a second image of the surface of the recording sheet illuminated with the second light beam. A first straight line including a ray in a center of the first light beam and a second straight line including a ray in a center of the second light beam intersect with each other, when each straight line is projected onto the surface of the recording sheet, and a detection device configured to detect information about the unevenness on the surface of the recording sheet based on the first image and the second image.

Description

Recording sheet surface detection apparatus and image processing system
Technical field
The present invention relates to come the recording chart surface detection apparatus of the surface appearance of detection record sheet material, and relate to the image processing system that the result who detects based on the recording chart surface controls image forming conditions based on the surface image that forms by image capture apparatus.
Background technology
The image processing system of utilization such as duplicating machine and laser beam printer, be transferred on the recording sheet under predetermined transfer printing condition by the visible developed image of developing device, and, under predetermined fixing conditions, apply heat and pressure image with the transfer printing of the institute of photographic fixing in the above to recording sheet.
In the image processing system of routine of configuration thus, for example, the size that is set by the user recording sheet on the guidance panel disposed thereon and type (below, the type of recording sheet is called as paper mold).Based on the setting on the guidance panel, control transfer printing condition (transmission speed of the recording sheet when comprising transfer bias and image transfer printing) and fixing conditions (transmission speed of the recording sheet when comprising fixing temperature and photographic fixing).
Japanese Patent Application Publication No.2004-38879 has discussed the technology that comprises following aspect: catch the surface appearance of recording sheet by using area sensor; Detect surface smoothness from the surface image of catching; Determine the paper mold of recording sheet; Control transfer printing condition and/or fixing conditions with the result who determines based on paper mold.Owing to directly caught, therefore thisly determine aspect the precision very excellent in paper mold by the technology of using area sensor to catch the surface image of recording sheet by the shade that concave-convex surface produces.Especially, in the time can clearly distinguishing the having or not of concave-convex surface, size and the degree of depth with visual manner, for example, when distinguishing coated paper and uncoated paper (common paper), this method provides high paper mold to determine precision.
But when determining general office with the paper mold of recording sheet, for example, the shade situation that is produced by concave-convex surface depends on the fiber configuration greatly and promptly makes the direction of paper (below, be called fiber configuration direction).Particularly, when from the direction that intersects vertically with fiber configuration direction during with rayed paper surface, the image of catching provides the high-contrast of emphasizing concave-convex surface.But when from the direction identical with fiber configuration direction during with rayed paper surface, because the shade that is produced by concave-convex surface is not obvious, therefore the image of catching provides low contrast.Therefore, even for the paper of same type, the contrast of the image of catching is also different greatly, thus cause vertical sheet material by and the Different Results determined of paper mold between laterally sheet material passes through.
Utilize the technology among the Japanese Patent Application Publication No.2004-38879, fiber configuration direction in nearly all paper mold meets under the prerequisite of the angular range from 0 (unanimity) to ± 15 degree about recording sheet transmission direction or perpendicular crossing direction, especially, spend from vergence direction rayed recording sheet with 15～70 about the recording sheet transmission direction.The image in this rayed zone is caught to improve paper mold by area sensor and is determined precision.But the fiber configuration direction of recording sheet depends on the match ratio of raw material in the manufacture process.But, in recent years, make recording chart by the different manufacture processes of various manufacturing locations, this causes different fiber configuration directions.Therefore, fiber configuration direction may not be about the vertical or horizontal angular range that meets from 0 (unanimity) to ± 15 degree of recording sheet.Therefore, utilize catching among the Japanese Patent Application Publication No.2004-38879 to use from the technology of the surface image in light-struck zone of a direction, identical recording sheet may provide the Different Results that paper mold is determined according to the relation that fiber disposes between direction and the rayed direction.
Summary of the invention
The present invention is intended to reduce the variation of the testing result that is caused by the fiber configuration direction of recording sheet and the relation between the rayed direction, and the paper mold that has the recording sheet of any fiber configuration direction with raising is determined precision.
By the following explanation of reference accompanying drawing reading exemplary embodiment, it is obvious that further feature of the present invention will become.
Description of drawings
Be contained in the instructions and constitute its a part of accompanying drawing exemplary embodiment of the present invention, feature and many aspects are shown, and be used from explanation one and explain principle of the present invention.
Figure 1A is the sectional drawing that forms device according to the coloured image of first exemplary embodiment.
Figure 1B is the block diagram that illustrates according to the action control of the image processing system of first exemplary embodiment.
Fig. 2 A is the skeleton view according to the recording chart surface detection apparatus of first exemplary embodiment.
Fig. 2 B is the top view according to the recording chart surface detection apparatus of first exemplary embodiment.
Fig. 2 C is the sectional drawing according to the recording chart surface detection apparatus of first exemplary embodiment.
Fig. 3 A illustrates from the concave-convex surface image in the zone of the light-struck paper mold of vertical usefulness (1) of paper.
Fig. 3 B illustrates from the concave-convex surface image in the zone of the light-struck paper mold of horizontal usefulness (1) of paper.
Fig. 4 A is the histogram that the Luminance Distribution of the concave-convex surface image among Fig. 3 A is shown.
Fig. 4 B is the histogram that the Luminance Distribution of the concave-convex surface image among Fig. 3 B is shown.
Fig. 5 is the diagrammatic sketch that the luminance difference testing result of paper mold (1) in first exemplary embodiment and (2) is shown.
Fig. 6 is the skeleton view according to the recording chart surface detection apparatus of the modification of first exemplary embodiment.
Fig. 7 A is the top view that the restriction condition of recording chart surface detection apparatus is shown.
Fig. 7 B is the sectional drawing that the restriction condition of recording chart surface detection apparatus is shown.
Fig. 8 is the top view according to the recording chart surface detection apparatus of second exemplary embodiment
Fig. 9 A is the skeleton view according to the recording chart surface detection apparatus of the 3rd exemplary embodiment.
Fig. 9 B is the top view according to the recording chart surface detection apparatus of the 3rd exemplary embodiment.
Fig. 9 C is the side view according to the recording chart surface detection apparatus of the 3rd exemplary embodiment.
Figure 10 A illustrates from the concave-convex surface image in the zone of the light-struck paper mold of vertical usefulness (1) of paper.
Figure 10 B illustrates from the concave-convex surface image in the zone of the light-struck paper mold of horizontal usefulness (1) of paper.
Figure 11 is the top view according to the recording chart surface detection apparatus of first modification of the 3rd exemplary embodiment.
Figure 12 is the top view according to the recording chart surface detection apparatus of second modification of the 3rd exemplary embodiment.
Figure 13 is the top view according to the recording chart surface detection apparatus of the 3rd modification of the 3rd exemplary embodiment.
Figure 14 A is the skeleton view according to the recording chart surface detection apparatus of the 4th exemplary embodiment, and Figure 14 B is the top view according to the recording chart surface detection apparatus of the 4th exemplary embodiment.
Figure 14 C is the side view according to the recording chart surface detection apparatus of the 4th exemplary embodiment.
Figure 15 A is the front elevation according to the recording chart surface detection apparatus of the modification of the 4th exemplary embodiment.
Figure 15 B is the side view according to the recording chart surface detection apparatus of the 4th exemplary embodiment.
Figure 16 is the top view as the recording chart surface detection apparatus of the comparative pattern of first exemplary embodiment.
Figure 17 is the diagrammatic sketch that the luminance difference testing result of paper mold (1) in the comparative pattern of first exemplary embodiment and (2) is shown.
Figure 18 is the top view that the problem of recording chart surface detection apparatus is shown.
Figure 19 is the top view that the problem of recording chart surface detection apparatus is shown.
Embodiment
Below, describe each exemplary embodiment of the present invention, feature and many aspects with reference to the accompanying drawings in detail.
But, the invention is not restricted to the exemplary embodiment of following explanation; Especially, can revise size, material, shape and the relative position of the parts in the exemplary embodiment of following explanation in a different manner according to using device of the present invention and various condition.
Below explanation is comprised the image processing system of the recording chart surface detection apparatus of first exemplary embodiment according to the present invention.At first explanation is comprised image processing system according to the recording chart surface detection apparatus of first exemplary embodiment.Then, the recording chart surface detection apparatus that detailed description is used for this image processing system.
Can for example form the recording chart surface detection apparatus that uses in the device according to first exemplary embodiment at electronic photograph color image.Figure 1A illustrates the sectional drawing that the cascade connection type coloured image that forms the use intermediate transfer belt of device as exemplary electronic photograph coloured image forms the internal configurations of device.
Coloured image shown in Figure 1A forms device and has four handle boxes 31 (31Y, 31M, 31C and 31Bk) that constitute first to the 4th image formation unit respectively.These four image formation units form yellow, magenta, cyan and black image respectively, and have identical configuration except the toner color.With reference to Figure 1A, symbol Y, M, C and Bk represent respectively to form the unit corresponding components with yellow, magenta, cyan and black image.But in the following description, in the time need not distinguishing color especially, symbol Y, M, C and Bk are omitted.
Hereinafter with reference to the action of Figure 1A explanation according to the image formation unit of the image processing system of this exemplary embodiment.When control module 10 receives print image signal, by feed rolls to 17 and delivery roll send recording sheet P from sheet material box 15 to image formation unit to 18.Then, recording sheet P was once stopped 19a and 19b by opposing roller (resist roller), and the opposing roller is used to make image to form the transmission unit of the transmitting synchronous of action (aftermentioned) and recording sheet P to 19a and 19b.
Simultaneously, control module 10 is carried out exposure to form electrostatic latent image on the surface of photosensitive drums 1 according to the picture signal indication exposure scanner unit 11 that receives, and photosensitive drums 1 is to be recharged the photosensitive-member that roller 2 is charged to fixed potential.The driving force of driving motor (not shown) is transferred to photosensitive drums 1 so that itself and image form action synchronously along turning clockwise.
Developer unit 8 is to be used for latent electrostatic image developing so that its visible unit.Developer unit 8 has the development of being applied in bias voltage so that the visible development sleeve 5 of electrostatic latent image.Like this, because the effect of developer unit 8, the electrostatic latent image that forms on the surface of photosensitive drums 1 is developed and is toner image.Photosensitive drums 1, charged roller 2 and developer unit 8 are integrated in the handle box 31 that removably is attached on the image processing system.
With each intermediate transfer belt that contacts 24 in the photosensitive drums 1 when coloured image forms and among photosensitive drums 1Y, 1M, 1C and the 1Bk rotation of each synchronously be rotated counterclockwise.Be transferred in succession on the intermediate transfer belt 24 at the color toner image that develops on each photosensitive drums, and the active layer of the primary transfer bias voltage by being applied to primary transfer roller 4 is stacked in over each otherly, on intermediate transfer belt 24, produces the multi-color toner image thus.Then, the multi-color toner image that forms on intermediate transfer belt 24 is transferred to and comprises secondary transfer roller to 25 secondary transfer printing retained part.Simultaneously, recording sheet P that 19a and 19b is stopped by roller and the ground of the multi-color toner image synchronization on the intermediate transfer belt 24 are transferred to the secondary transfer printing retained part by the opposing roller to the effect of 19a and 19b.By being applied to the effect of secondary transfer roller to the secondary transfer printing bias voltage on 25, the multi-color toner image on the intermediate transfer belt 24 is transferred on the recording sheet P in the lump.
Fixation unit 21 in transmission log sheet material P with the multi-color toner image fusion of transfer printing and photographic fixing to recording sheet P.Shown in Figure 1A, fixation unit 21 have be used for to recording sheet P apply heat warm-up mill 21a exert pressure so that its pressure roll 21b that contacts with warm-up mill 21a to it with being used for.When keeping multi-color toner record images sheet material P by warm-up mill 21a and pressure roll 21b transmission, apply heat and pressure to recording sheet P, make toner image by photographic fixing to the surface of recording sheet P.After toner image was by photographic fixing, recording sheet P was discharged in the discharge dish 16 20 by distributing roller, finished image thus and formed action.
Cleaning unit 28 is removed residual toner with cleaning band from middle transfer belt 24, and the remaining toner of removal is used as used toner and leaves in the cleaner container 29.
Carry out above-mentioned image formation action by the control module 10 that is contained in the image processing system.
In the image processing system in Figure 1A, be set at the opposing roller to the upstream side of recording sheet transmission direction (that is, along) before 19a and the 19b according to the recording chart surface detection apparatus 40 of this exemplary embodiment.Recording chart surface detection apparatus 40 can detect the information about the concave-convex surface (surface smoothness) of the recording sheet P that transmits from sheet material box 15.From sheet material box 15 after image formation unit is sent recording sheet P, when opposing roller that recording sheet P is used as transmission unit stops 19a and 19b, the surface appearance of recording chart surface detection apparatus 40 detection record sheet material P.
Figure 1B is the control block diagram that the action control of image processing system is shown.Based on the detection information that the driving computing unit 40C from recording chart surface detection apparatus 40 sends, control module 10 is controlled the image forming conditions of each image formation unit best with the operation image processing system.Especially, comprise secondary transfer roller to 25 secondary transfer printing bias voltage be contained in the fixing temperature of the warm-up mill 21a in the fixation unit 21 by the image forming conditions of control module 10 control.
Recording chart surface detection apparatus 40 according to first exemplary embodiment below will be described.Fig. 2 A～2C illustrates the configured in one piece of the image of the concave-convex surface that is used to catch recording sheet P.Fig. 2 A is the skeleton view of recording chart surface detection apparatus 40, and Fig. 2 B is its top view, and Fig. 2 C is its sectional drawing that cuts along the A-A ' line among Fig. 2 B.Comprise as irradiation luminous diode (LED) 42A of light source and 42B, as the CMOS area sensor 43A of image-capture device and 43B and as the imaging len 44SA and the 44SB of imaging means according to the recording chart surface detection apparatus 40 of this exemplary embodiment.Recording chart surface detection apparatus 40 is set to the image formation surface in the face of recording sheet P.For convenience of explanation, in Fig. 2 A～2C, the recording chart surface detection apparatus 40 among Figure 1A is rotated 180 degree (turning upside down).
As the irradiation LED 42A and the 42B that in this exemplary embodiment, use, use White LED (from the product No.NSPW300DS of Nichia Corporation) with high directivity.Shown in Fig. 2 A and Fig. 2 B, irradiation LED 42A is set to first light source, makes that the straight line of the optical axis project to first light source on the recording sheet P is consistent with the recording sheet transmission direction.And irradiation LED 42B is set to secondary light source, makes that the straight line of the optical axis project to the secondary light source on the recording sheet P is vertical with the recording sheet transmission direction.Shown in Fig. 2 C, be irradiated on the surface of recording sheet P from two light beams of two light sources incident angles with 15 degree.By light shining on the surface of recording chart with little incident angle by this way, make it possible to emphasize the shade that produces by the concave-convex surface on the recording sheet P.For the shade of emphasizing to produce, wish not use rayed paper surface to the little incident angle of 20 degree (comprising) from 0 (not comprising) by the concave-convex surface on the recording sheet P.
From specific direction rayed recording sheet P, and, shade produced by the concave-convex surface on it.Assembled and be drawn towards respectively then CMOS area sensor 43A and 43B by imaging len 44SA and 44SB from the folded light beam that produces the zone of shade by rayed.Catch each regional image of the lip-deep preliminary dimension of recording sheet P as the CMOS area sensor 43A of first area sensor with as among the CMOS area sensor 43B of second area capture device each by using each folded light beam.Folded light beam reflection recording sheet P is lip-deep by the concave-convex surface (surface smoothness) in each zone of rayed generation shade.Among CMOS area sensor 43A and the 43B each is respectively caught each pixel in the image for described zone, detects the image voltage signal that changes according to reflection light quantity, and it is outputed to drives computing unit 40C.In case receive the image voltage signal from CMOS area sensor 43A and 43B, the A/D conversion of just carrying out signal as the driving and the arithmetic element 40C of detecting device, 256 gray scale digital signals (monochrome information) after the A/D conversion are calculated contrast (luminance difference), and the contrast that obtains is outputed to control module 10.Particularly, detect contrast as the driving computing unit 40C of detecting device by the surface image of catching as the CMOS area sensor 43 of image-capture device.Drive light quantity and luminous timing that computing unit 40C also drove and controlled irradiation LED 42.CMOS area sensor 43 and driving computing unit 40C are contained in the recording chart surface detection apparatus 40.
In this exemplary embodiment, CMOS area sensor 43A has 1.5mm (the vertical) * valid pixel size of 1.5mm (level) and the resolution of 600dpi with 43B.With imaging len 44SA and 44SB combination, can catch the zone of size of the lip-deep 3.0mm of having (the vertically) * 3.0mm (level) of recording sheet with the resolution of 300dpi.Area sensor refer to can be once two dimension catch information about the sensor of the pixel of the pixel of a plurality of arranged perpendicular and a plurality of horizontal arrangement.Shown in Fig. 2 A～2C, CMOS area sensor 43A and 43B are set at and use from (along the position of the direction that roughly intersects with the Surface Vertical of recording sheet P) under light-struck zone of irradiation LED 42A and 42B.Especially, after being assembled by imaging len 44SA and 44SB from the folded light beam in rayed zone and being drawn towards CMOS area sensor 43A and 43B respectively then, optical axis roughly intersects with the Surface Vertical of recording sheet P.
In this exemplary embodiment, with light beam irradiates recording sheet P, and CMOS area sensor 43A and 43B catch the surface image in each rayed zone from the both direction different with the fiber of recording sheet P configuration direction.In other words, make the lip-deep straight line that comprise first and second optical axises that project to recording sheet P intersect each other with the primary optic axis of the light beam that shines the first rayed zone with from the secondary light source emission with second optical axis of the light beam that shines the second rayed zone from first light emitted.Therefore, for example, even the straight line of the optical axis of a light source on projecting to recording sheet P is consistent with fiber configuration direction and therefore image that catch is compared with concave-convex surface when representing low contrast, therefore the straight line that projects to the optical axis of another light source on the recording sheet P also represents the high-contrast of reflection concave-convex surface along the image that disposes the different direction orientation of direction with fiber and catch.Therefore, by for example taking all factors into consideration this two images by being averaged, can reduce the variation of the testing result that causes by the relation between the fiber of recording sheet P configuration direction and the rayed direction, the precision when improving the concave-convex surface of determining on the recording sheet P thus.The mean direction of lip-deep each fiber of recording sheet in the fiber configuration direction indication recording sheet of recording sheet.
Below explanation is illustrated the exemplary embodiment of the effect of above-mentioned configuration.In experiment, use two kinds of different paper molds: (1) by the A4 size of along inclined direction cutting Ledger size common paper (Xerox Business (registered trademark) 4200 20Lb) and obtaining paper mold (1) and by paper mold (2) along the A4 size of the identical common paper acquisition of fiber configuration direction (vertically) cutting.The detection of paper mold (1) and (2) below will be described.When with microscopic examination A4 size paper mold (1), fiber configuration direction is about fore-and-aft tilt 20 degree of paper.Fig. 3 A and Fig. 3 B illustrate the image by the surface of using the paper mold (1) of catching according to the recording chart surface detection apparatus of this exemplary embodiment.Fig. 3 A illustrate by CMOS area sensor 43A catch from the vertical identical direction of paper concave-convex surface image with the zone of the preliminary dimension on light-struck paper mold (1) of irradiation LED 42A.Fig. 3 B illustrate by CMOS area sensor 43B catch from the vertical vertical direction (laterally) of paper concave-convex surface image with the zone of the preliminary dimension on light-struck paper mold (1) of irradiation LED 42B.Fig. 4 A and Fig. 4 B illustrate the monochrome information (digital signal level) of these concave-convex surface images with histogrammic form.With reference to Fig. 4 A and Fig. 4 B, 256 gray scale intensities information (digital signal level) of transverse axis presentation surface bump maps picture, the longitudinal axis represents to show as the pixel count in the capture region of frequency.
Drive the mean value Imax of computing unit 40C calculating from the signal of five pixels with first to the 5th maximum brightness (ceiling voltage) information (digital signal level).Driving computing unit 40C also calculates the mean value Imin from the signal of five pixels with first to the 5th minimum brightness (minimum voltage) information.Drive computing unit 40C and obtain luminance difference Δ I for each image, that is, and the difference between Imax and the Imin.Fig. 5 illustrates the result of the luminance difference detection of above-mentioned A4 size paper mold (1) and (2).For example, from demonstrating tangible shade with the image in the rayed zone on light-struck paper mold (1), thereby provide big luminance difference Δ I (1) B with the vertical vertical direction (laterally) of paper.On the contrary, from demonstrating unconspicuous shade with the image in the zone on light-struck paper mold (1), thereby provide little luminance difference Δ I (1) A with the vertical identical direction of paper.Drive computing unit 40C and obtain Δ I (1) A and Δ I (1) B, and calculate its mean luminance differences Δ I (1) (ave).Similarly, drive computing unit 40C and calculate mean luminance differences Δ I (2) (ave) from Δ I (2) A and Δ I (2) B for paper mold (2).As shown in Figure 5, the A4 size paper mold (2) of the vertical consistency of fiber configuration direction and paper provides big difference between Δ I (2) A and Δ I (2) B.On the contrary, fiber configuration direction provides little difference about the paper mold (1) of fore-and-aft tilt 20 degree of paper between Δ I (1) A and Δ I (1) B.This means that the luminance difference in each concave-convex surface image depends on the fiber configuration direction of paper.On the other hand, the mean luminance differences Δ I (ave) of each converges to much at one value in paper mold (1) and (2).This means and to reduce the dependence of testing result by catching the image of using from light-struck two rayed zones of two Different Light for fiber configuration direction.
As the comparative pattern of this exemplary embodiment, on the basis of experiment, make the recording chart surface detection apparatus (catching image) of known general type based on a light source and one.Then, as shown in figure 16, detect by using above-mentioned two A4 size paper molds (1) and (2) to carry out the paper surface.Because except irradiation LED 42 is provided so that the straight line that projects to its optical axis on recording sheet (paper) P is about recording sheet transmission direction inclination 45 degree, dispose this comparative pattern in the mode identical, therefore the explanation of omitting this comparative pattern with this exemplary embodiment.
Figure 17 illustrates the result who detects by the paper surface of using this recording chart surface detection apparatus to obtain.Compare with the paper surface detection of the paper mold (2) of the vertical consistency of A4 size paper with fiber configuration direction, fiber configuration direction detects about the paper surface of the paper mold (1) of fore-and-aft tilt 20 degree of A4 size paper much smaller luminance difference Δ I is provided.More specifically, though use identical paper mold, according to the fiber configuration direction of paper, comparative pattern provides the paper big different result that the surface is detected.
On the contrary, this exemplary embodiment makes it possible to reduce testing result for the dependence of the fiber configuration direction of recording sheet and therefore reduce the variation of testing result, improves concave-convex surface thus and determines precision.
And in this exemplary embodiment, the primary optic axis of irradiation LED 42A is vertical with second optical axis of irradiation LED 42B.Utilize this configuration, when a rayed zone catch the low luminance difference of graphical representation (contrast) time, the image of catching in another rayed zone is represented high luminance difference (contrast) without any exception.Therefore, in recording sheet with any fiber configuration direction, can be by using mean luminance differences Δ I (ave), promptly, two mean values of catching the luminance difference (contrast) of image reduce the variation of the testing result that is caused by the fiber of recording sheet configuration direction most effectively.But primary optic axis may not be vertical with second optical axis.Can from the well-known configurations of routine (based on catching image with of light-struck zone of a light source) from a direction relatively understand this point.Therefore, by using from two different directions, can reduce the variation of testing result, and can improve concave-convex surface thus and determine precision with light-struck two mean luminance differences Δ I (ave) that catch image with two zones of different shade conditions.Therefore, preferred disposition first and second light sources make that the straight line project to connection first light source on the recording sheet P and the first rayed zone is crossing with the straight line that is connected the secondary light source and the second rayed zone on projecting to recording sheet P.
Utilize above-mentioned configuration, determine by using two mean luminance differences Δ I (ave) that catch image.But the method for determining is not limited to this method.As other method, for example, can be that Δ I (1) (a) adds that Δ I (1) luminance difference (b) determines by using two luminance differences of combination.Scheme as an alternative, the combination ratio of two luminance differences can according to described two luminance difference Δ I (1) (a) and Δ I (1) difference (b) change.And, can catch in the image any by use, for example determine by the image of catching that uses big luminance difference.And, in the method, and only compared by imaging method with a light-struck zone from a direction, obtain different definite results' possibility reduction about identical recording sheet.
Utilize above-mentioned configuration, though the first and second rayed zones are set to not have the independent zone of lap on the surface of recording sheet P,, these two zones can be provided so that they overlap mutually.In this case, when the image of catching with a zone of a light source irradiation, another light source is not luminous.In other words, luminous timing is distinguished between irradiation LED 42A and 42B.Therefore, the timing of image capturing is also distinguished between the first and second rayed zones, that is, once catch for a regional carries out image.Owing to handle them in the mode identical, therefore omit described two explanations of catching image with above mode.
And, though two irradiation LED 42A and 42B are used as first and second light sources respectively,, as shown in Figure 6,, can use irradiation LED 42 as substituting of two irradiation LED 42A and 42B.In this case, irradiation LED 42 can be along two different direction emission light beams to shine the first and second rayed zones.
Though LED is used as light source in this exemplary embodiment,, for example, also can use xenon lamp or Halogen lamp LED as light source.In brief, just shine the ability of enough light quantities for the requirement of necessity of light source with the shade emphasizing to produce by the concave-convex surface on the recording sheet.And as substituting of area sensor, the line sensor that can use the pixel with edge direction configuration vertical with the recording sheet transmission direction is as image-capture device.Can in recording sheet transmission direction portable cord sensor, catch image.And,, can use CCD type sensor as substituting of CMOS type sensor.In brief, just catch the ability of the image of the concave-convex surface on the recording sheet for the requirement of necessity of image-capture device.
Though be used for detecting among the driving computing unit 40C of recording chart surface detection apparatus 40 that the measuring ability of the contrast of the surface image of being caught by CMOS area sensor 43 is contained in this exemplary embodiment, this function can be contained in the control module 10 of image processing system.In this exemplary embodiment, control module 10 is based on the result of the recording sheet concave-convex surface detection of recording chart surface detection apparatus 40, control transfer bias or fixing temperature.But controlling factor is not limited thereto, and control module 10 can also control example form speed (processing speed) as various controlled variable and a series of images in each process that forms such as sub-image and develop.In brief, the relevant any image forming conditions of image formation unit that is used on recording sheet, forming image in control module 10 may command and the image processing system.
Understand first exemplary embodiment specifically based on LED configuration, make when sending light beam with the inverted V-shaped shape when the downstream of recording sheet transmission direction is watched from irradiation LED 42A and 42B.Will be based on LED configuration instruction second exemplary embodiment of the modification of recording chart surface detection apparatus 40.In this exemplary embodiment, be endowed identical Reference numeral with element components identical in first exemplary embodiment, and will the repetitive description thereof will be omitted, therefore following the LED configuration will only be described.
Fig. 7 A and Fig. 7 B illustrate the variations according to the recording chart surface detection apparatus 40 of first exemplary embodiment among Fig. 2.Irradiation LED 42A and 42B be access areas sensor 43A and 43B and imaging len 44SA and 44SB more.Fig. 7 A is a top view, and Fig. 7 B is the sectional drawing that cuts along the A-A ' line among Fig. 7 A.With reference to Fig. 2 B and Fig. 7 A, the irradiation LED 42A from Fig. 7 A and 42B emission has the beam spread angle (α) bigger than the beam spread angle among Fig. 2 B with in the light beam of irradiates light irradiation area each.When light beam was expanded greatly by this way excessively, a rayed zone comprised high-contrast part and low contrast part simultaneously, and this has increased the complexity of definite algorithm, or has reduced concave-convex surface and determined precision.Therefore, irradiation LED 42A and 42B are divided to a certain extent respectively opens with area sensor 43A and 43B and imaging len 44SA and 44SB.Shown in Fig. 7 B, along the normal direction of recording sheet P, irradiation LED 42A and 42B can interfere near the transmission path (part X) of recording sheet P.This is to make irradiation LED 42A and 42B divide another reason of opening (restriction condition) with area sensor 43A and 43B and imaging len 44SA and 44SB to a certain extent.
In this exemplary embodiment, will consider that below this restriction condition explanation is used to make the LED configuration of recording sheet surface detection apparatus miniaturization.Fig. 8 is the top view according to the recording chart surface detection apparatus 40 of this exemplary embodiment.Two irradiation LED 42A and 42B preferably are set, make each light beam intersect each other.In other words, has the relation that makes that the straight line of lip-deep these optical axises of projecting to recording sheet P intersects each other from irradiation LED 42A emission with the optical axis of the light beam that shines the second rayed zone with the optical axis of the light beam that shines the first rayed zone with from irradiation LED 42B emission.These LED configurations make it possible to disposing the necessary parts that are used to form light path compactly the light path from light source to the rayed zone at least.Therefore, can reduce irradiation LED 42A and 42B and the first and second rayed zones, make it possible to realize the miniaturization of recording chart surface detection apparatus thus in the lip-deep projected area of recording sheet P.
Light path from the rayed zone to cmos sensor 43A and 43B below will be described.When projection cmos sensor 43A and 43B on the surface of recording sheet P, each center in projection irradiation LED 42A, irradiation LED 42B, first rayed zone and the second rayed zone on the surface of recording sheet P makes cmos sensor be preferably placed at by in the quadrilateral area that connects these four somes formation.When the normal direction of recording sheet P is watched, the light path that makes it possible to from the rayed zone to cmos sensor 43A and 43B of Pei Zhi cmos sensor 43A and 43B meets the scope that is occupied by the light path from light source to each rayed zone by this way.In other words, when when the normal direction of recording sheet P is watched, can reduce the lip-deep view field of recording chart surface detection apparatus by making light path with overlapping to the light path of cmos sensor 43A and 43B from the rayed zone from irradiation LED 42A and 42B to each rayed zone at recording sheet P.As a result of, further miniaturization of whole recording chart surface detection apparatus.In this exemplary embodiment, similar with first exemplary embodiment, cmos sensor 43A and 43B be set at from each rayed zone to roughly with the position of the direction skew of the Surface Vertical of recording sheet on.Therefore, light path from irradiation LED 42A and 42B to the light path in each rayed zone, from the rayed zone to cmos sensor 43A and 43B and the necessary parts that are used to form these light paths satisfy above-mentioned condition.Compare with Fig. 2, comprise that under these conditions recording chart surface detection apparatus among Fig. 8 of the irradiation LED 42A of configuration and 42B, the first and second rayed zones and cmos sensor 43A and 43B makes it possible to width is reduced to about 50% (from W to W * 0.5).
In this exemplary embodiment, can catch similarly from the image of two different directions with first exemplary embodiment with light-struck two zones of two light sources.This configuration makes it possible to reduce testing result for the dependence of the fiber configuration direction of recording sheet and therefore reduce the variation of testing result, improves concave-convex surface thus and determines precision.And this exemplary embodiment can realize the miniaturization of recording chart surface detection apparatus.
Fig. 9 A is the skeleton view according to the recording chart surface detection apparatus of the 3rd exemplary embodiment, and Fig. 9 B is its top view, and Fig. 9 C is its side view.Comprise as the irradiation LED 42A of light source and 42B, as the shadow shield 46 of shading means, as the CMOS line sensor 43L of image-capture device with as the imaging len array 44A of imaging means according to the recording chart surface detection apparatus 40 of the 3rd exemplary embodiment.To be omitted with the explanation of element components identical in first exemplary embodiment.
In this exemplary embodiment, (model SLR343WBC7T is from ROHM Co., Ltd.) for using standard lamp type White LED as the irradiation LED 42A of light source and 42B.Shown in Fig. 9 A and Fig. 9 B, be under the prerequisite of positive dirction in the clockwise direction, irradiation LED 42A is set up as first light source, the feasible straight line that projects to the optical axis of first light source on the recording sheet P is spent about recording sheet transmission direction inclination+45, and, irradiation LED 42B is set up as secondary light source, and the feasible straight line that projects to the optical axis of the secondary light source on the recording sheet P is spent about recording sheet transmission direction inclination-45.This means, when when the downstream of recording sheet transmission direction is watched, with the optical axis of two light sources of inverted V-shaped shape configuration.Shown in Fig. 9 C, spend two zones shining on the same straight lines that intersect vertically with the recording sheet transmission direction about the surface of recording sheet P with 15 from the light beam of two light sources.CMOS line sensor 43L and imaging len array 44A are provided so that their vertical and recording sheet transmission directions separately intersect vertically.This configuration makes it possible to realize the image capturing with two the rayed zones (the first and second rayed zones) on the straight line that intersects vertically with the recording sheet transmission direction of irradiation LED 42A and 42B irradiation.The first and second rayed zones are different zones.
Shadow shield 46 is the plate-shaped members that be arranged in parallel with the recording sheet transmission direction.Shadow shield 46 intention is to prevent that the rayed of irradiation LED 42B will be with light-struck first rayed zone of irradiation LED 42A, and prevents that the rayed of irradiation LED 42A will be with light-struck second rayed zone of irradiation LED 42B.And shadow shield 46 is made by dark features, to prevent its lip-deep diffuse reflection when the rayed of using from two irradiation LEDs.And, wish that carrying out matte finish for the surface of shadow shield 46 handles, to prevent its lip-deep regular reflection.
The folded light beam in the zone of the shadow information of the concave-convex surface (surface smoothness) on the next self-contained reflection recording sheet P is assembled by imaging len array 44A, and is caught by CMOS line sensor 43L as line image then.CMOS line sensor 43L detects the image voltage signal that each line for the pixel in the line image of catching changes according to reflection light quantity, and it is outputed to drives computing unit 40C.In case receive the image voltage signal from CMOS line sensor 43L, change to detect the digital signal (monochrome information) after A/D changes as the driving of detecting device and the A/D that arithmetic element 40C just carries out signal.In recording sheet transmission direction moving recording sheet material P, in the image capturing action of each line of pixel, digital signal (monochrome information) is connected in succession to produce regional luminance information.Drive computing unit 40C and calculate contrast (luminance difference), and it is outputed to control module 10 from zone digit signal (monochrome information).In other words, the driving computing unit 40C as detecting device detects the contrast that calculates from by the regional luminance information that connects the line image generation of being caught by the CMOS line sensor 43L as image-capture device in succession.CMOS line sensor 43L and driving computing unit 40C are contained in the recording chart surface detection apparatus 40.
The CMOS line sensor 43L that is used for this exemplary embodiment has the valid pixel length (vertically) of 20mm and the resolution of 600dpi.At recording sheet P by when 19a and 19b being transferred to secondary transfer printing pressing part as the opposing roller of transmission unit, control module 10 is carried out above-mentioned image capturing action by making recording sheet P move 5mm along the recording sheet transmission direction for each line of pixel.More specifically, CMOS line sensor 43L catches the image of the line that connects following pixel as line image, and described pixel is the pixel of the preliminary dimension in the lip-deep second rayed zone of the pixel of the preliminary dimension in the lip-deep first rayed zone of recording sheet P and recording sheet P.The opposing roller to 19a and 19b as transmission unit transmission log sheet material P in, CMOS line sensor 43L catches the image on the surface of recording sheet P successively, obtains the lip-deep 5 * 20mm of recording chart thus with the resolution of 600 * 600dpi 2The monochrome information in zone.Line sensor refers to the sensor of line information of the pixel of the pixel that can catch an arranged perpendicular and a plurality of horizontal arrangement.Can also be vertically and a plurality of such line sensors of horizontal arrangement, to catch information simultaneously about a plurality of lines.By using line sensor by this way, make it possible in transmission log sheet material P, realize the image capturing on the surface of recording sheet P.Therefore, compare with the situation of when recording sheet P stops, carrying out image capturing, can be under the condition of the turnout deterioration that does not make image processing system the surface appearance of detection record sheet material.
In by the area image of catching the action acquisition in succession for each line carries out image of pixel, 5 * 10mm, half zone is the shadow image that shines generation from the light of irradiation LED 42A by using, and another 5 * 10mm half zone is by using the shadow image from the rayed generation of irradiation LED 42B.Drive computing unit 40C by using light from irradiation LED 42A and 42B to extract 5 * 5mm zone near shining in two and half area images of acquisition each center.For example, Figure 10 A and Figure 10 B illustrate by with two surface images that like the technology type of first exemplary embodiment, obtain for the surface detection technique of A4 size paper mold (1).Drive computing unit 40C by with analytical technology like the technology type of first exemplary embodiment, the concave-convex surface on the detection record sheet material P.Control module 10 is based on the image forming conditions of testing result control such as the image formation unit of best transfer bias and fixing temperature.
As mentioned above, in this exemplary embodiment, catch similarly from the image of two different directions with light-struck two zones of two light sources with first exemplary embodiment.This configuration makes it possible to reduce testing result for the dependence of the fiber configuration direction of recording sheet and therefore reduce the variation of testing result, improves concave-convex surface thus and determines precision.
And, in this exemplary embodiment, shadow shield 46 is set to prevent will to use light-struck first and second rayed zones from other direction from the rayed of a direction, prevent that thus concave-convex surface from determining the reduction of precision.
In this exemplary embodiment, though the shadow shield 46 that be arranged in parallel with the recording sheet transmission direction is used as the shading means, the shading means are not limited thereto.For example,, as shown in figure 11, can the shadow shield 47 that comprise slit be set not parallelly, come as the shading means with the recording sheet transmission direction as first modification of this exemplary embodiment.Shadow shield 47 comprises and is arranged on light and advances to the first slit 47A first light path in the first rayed zone and be arranged on light from irradiation LED 42A and advance to the second slit 47B second light path in the second rayed zone from irradiation LED 42B.Use comprises the shadow shield 47 of this slit, has reduced the restriction for the directivity of irradiation LED.This makes it possible to the optical axis of easier adjustment irradiation LED (light source), thereby helps the range of choice of expansion light source.
As the modification of first exemplary embodiment, as shown in Figure 8, also can use the shadow shield that comprises slit for the recording chart surface detection apparatus of optical axis with two irradiation LEDs that intersect each other.Figure 12 illustrates the recording chart surface detection apparatus according to second modification of the 3rd exemplary embodiment.In this case, the recording chart surface detection apparatus has the shadow shield 48 that comprises slit 48A in the position that first and second light paths intersect each other.This configuration make it possible to the modification of first exemplary embodiment similarly by making the optical axis intersection of two irradiation LEDs, realize the miniaturization of recording chart surface detection apparatus.Compare with Figure 11, the recording chart surface detection apparatus among Figure 12 makes it possible to width is reduced about 40%.And, utilize this configuration, can be simply, slit 48A stops light path on shadow shield 48 from two different directions by being set, be used to the cost that the crack is set and is used for handling its edge thereby reduce with enough precision.
But, utilize configuration according to second modification of this exemplary embodiment, as shown in figure 18, but from the light direct irradiation second rayed zone of irradiation LED 42A, but and from the light direct irradiation first rayed zone of irradiation LED 42B.In order to prevent this point, must carry out some configurations for the layout of irradiation LED 42A and 42B and the layout that comprises the shadow shield 48 of slit 48A.And, as shown in figure 19, can cause by the multipath reflection on the wall of shadow shield 48 or recording chart surface detection apparatus 40 before the slit, thereby reduce the contrast of the shadow image that obtains from the light of irradiation LED 42A and 42B.
The recording chart surface detection apparatus that has as two shadow shields of the means that are used to prevent these phenomenons shown in Figure 13.Except shadow shield shown in Figure 12 48, recording chart surface detection apparatus 40 shown in Figure 13 has second shadow shield 49 between irradiation LED 42 and shadow shield 48.Second shadow shield 49 comprises and is arranged on light and advances to the first slit 49A first light path in the first rayed zone and be arranged on light from irradiation LED 42A and advance to the second slit 49B second light path in the second rayed zone from irradiation LED 42B.This configuration makes it possible to prevent will be by the light-struck first and second rayed zones from other direction from the rayed of a direction, prevent that thus concave-convex surface from determining the reduction of precision.
Recording chart surface detection apparatus 40 according to the 4th exemplary embodiment below will be described.Figure 14 A is the skeleton view according to the recording chart surface detection apparatus of this exemplary embodiment, and Figure 14 B is its top view, and Figure 14 C is its side view.
Comprise as the irradiation LED 42A of light source and 42B, as the CMOS line sensor 43L of image-capture device, as the imaging len array 44A of imaging means and be used for and guide the light-guide device 45 on the surface of recording chart into from the light of irradiation LED 42A and 42B according to the recording chart surface detection apparatus 40 of this exemplary embodiment.Other element is identical with in first, second and the 3rd exemplary embodiment those, the therefore explanation that will omit these elements.
In this exemplary embodiment, use standard chips type White LED (model NSSW100CT is from NichiaCorporation) for irradiation LED 42A and 42B as light source.Enter light-guide device 45 and stand the influence of reflecting and reflecting therein from irradiation LED 42A and 42B emitted light beams.Therefore, the light beam that leaves light-guide device 45 is spent two parts of shining on the same straight lines that intersect vertically with the recording sheet transmission direction about the surface of recording sheet P with 15.
CMOS line sensor 43L and imaging len array 44A are provided so that their vertical and recording sheet transmission directions separately intersect vertically.The image capturing in two the rayed zones (the first and second rayed zones) on the straight line that intersects vertically with the recording sheet transmission direction that this configuration makes it possible to use irradiation LED 42A and 42B irradiation.The first and second rayed zones are different zones.
Pei Zhi recording chart surface detection apparatus 40 is to move surface appearance with detection record sheet material P with the similar mode of the 3rd exemplary embodiment thus, and, based on the result who detects, the image forming conditions of the image formation unit of control such as best transfer bias and fixing temperature.
As mentioned above, in this exemplary embodiment, catch similarly from the image of two different directions with light-struck zone of two light sources with first, second and the 3rd exemplary embodiment.This configuration makes it possible to reduce testing result for the dependence of the fiber configuration direction of recording sheet and therefore reduce the variation of testing result, improves concave-convex surface thus and determines precision.
And, in this exemplary embodiment, be irradiated to by light-guide device 45 on the surface of recording sheet P from the light of irradiation LED, with compensation light path in light-guide device 45, thereby make it possible to realize the miniaturization of recording chart surface detection apparatus.For example, compare with Figure 12, recording chart surface detection apparatus shown in Figure 14 makes it possible to the degree of depth is reduced about 40% (from D to D * 0.6).And the use of light-guide device 45 makes it possible to be provided with chip-shaped irradiation LED at a low price on the substrate identical with image-capture device (area sensor or line sensor), makes it possible to achieve cost and reduces.
Shown in Figure 15 A and Figure 15 B according to the recording chart surface detection apparatus 40 of the modification of this exemplary embodiment.Figure 15 A is the front elevation of the recording chart surface detection apparatus 40 watched from the downstream of transmission direction, and Figure 15 B is its side view.Shown in Figure 15 A and Figure 15 B, the incidence surface of light-guide device 45 has the first lens component 45A and the second lens component 45B, each lens component have respectively with from the corresponding section that shows curvature of the light of irradiation LED 42A and 42B.Lens component 45A and 45B by light-guide device 45 make from the light beam of irradiation LED 42A and 42B parallel to each other respectively.This configuration makes it possible to reduce two intervals between the irradiation LED along the Width of recording sheet surface detection apparatus 40, thereby makes it possible to further realize its miniaturization.For example, compare with Fig. 9, recording chart surface detection apparatus 40 shown in Figure 15 makes it possible to width is reduced to about 50% (from W to W * 0.5).And, lens component 45A on the incidence surface of light-guide device 45 and 45B have and are used to the function that makes light beam parallel to each other, thereby make it possible to parallel to each other and about its surface tilt ground parallel beam is shone on the recording sheet from the divergent beams of each irradiation LED.Therefore, become and to guarantee to be used to obtain the improvement of noise (S/N) ratio and enough light quantities that image forms speed.Therefore, can emphasize to reflect the shade of the concave-convex surface on the recording sheet.
Though with reference to exemplary embodiment the present invention has been described, has should be understood that to the invention is not restricted to disclosed exemplary embodiment.The scope of following claim should be endowed the wideest explanation to comprise all modification and equivalent configurations and function.

Claims (8)

1. one kind is used to detect the top image processing system that forms the surface appearance of record images sheet material, comprising:
Light source is launched first light beam and second light beam;
Image-capture device is configured to catch with first image on the surface of the recording sheet of first light beam irradiates with second image on the surface of the recording sheet of second light beam irradiates,
Wherein, when comprise first light beam in the heart light straight line and comprise second light beam in the heart the straight line of light when all being projected on the surface of recording sheet, comprise first light beam in the heart light straight line and comprise second light beam in the heart the straight line of light intersect each other; And,
Based on first image and second image detection lip-deep concavo-convex information about recording sheet.
2. according to the image processing system of claim 1, wherein, first light beam irradiates of first image is caught in lip-deep first rayed zone of recording sheet by image-capture device, and, second light beam irradiates of second image is caught in second rayed zone by image-capture device, and
Wherein, on the surface of recording sheet, there is not first rayed zone of common region different with the second rayed zone with the second rayed zone.
3. according to the image processing system of claim 2,
Wherein, light source comprises the secondary light source that is configured to launch first light source of first light beam and is configured to launch second light beam; And,
Wherein, when in first light beam in the heart light and second light beam in the heart light when all being projected on the surface of recording sheet, in first light beam in the heart light and second light beam in the heart light intersect each other.
4. according to the image processing system of claim 3, comprising:
First image-capture device is configured to catch first image; With
Second image-capture device is configured to catch second image,
Wherein, first image-capture device be set at from the first rayed zone to the position of the direction skew of the surperficial approximate vertical of recording sheet, and, second image-capture device be set at from the second rayed zone to the position of the direction skew of the surperficial approximate vertical of recording sheet.
5. according to the image processing system of claim 3, wherein, when image-capture device is projected on the recording sheet surface, the center of each is projected on the surface of recording sheet in first light source, secondary light source, first rayed zone and the second rayed zone, and image-capture device is positioned at by connecting the quadrilateral area that these four points form.
6. according to the image processing system of claim 1, comprising:
First light source is configured to launch first light beam; With
Secondary light source is configured to launch second light beam,
Wherein, first light beam irradiates of first image is caught in lip-deep first rayed zone of recording sheet by image-capture device, and second light beam irradiates of second image is caught in second rayed zone by image-capture device, and,
Wherein, on the surface of recording sheet, the first and second rayed zones have partly overlapping at least part.
7. according to the image processing system of claim 1, wherein, have the first record images sheet surface of catching and having between the second record images sheet surface of catching, disposing the light beam irradiates direction difference of direction with respect to the fiber on recording sheet surface.
8. according to the image processing system of claim 1,
Wherein, based on the lip-deep concavo-convex information about recording sheet, control is used for forming the condition of image on recording sheet.
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